Brush one side of each bread slice with olive oil, then spread the other side with wasabi mayonnaise. On the wasabi side of one slice, layer cheese, turkey, tomato slices, sprouts, and greens and top with remaining slice, wasabi side down. Place the sandwich in a nonstick skillet on medium-high heat with the cheese-turkey layers closest to the skillet surface. Use a ceramic plate to press the sandwich down and grill until lightly browned. Flip and repeat on other side.